<template>
  <div>
    <h3>商品列表</h3>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>新增商品</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-alert title="添加商品信息" type="info" center show-icon> </el-alert>
      <!-- 步骤栏 -->
      <el-steps :active="stepIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tabs -->
      <el-form :model="addForm" :rules="addFormRules" ref="ruleForm" label-width="100px" label-position="top">
        <el-tabs tab-position="left" v-model="stepIndex" :before-leave="beforeTabLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <!-- 商品名称 -->
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <!-- 商品价格 -->
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <!-- 商品重量 -->
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <!-- 商品数量 -->
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <!-- 商品分类 -->
            <el-form-item label="商品分类" prop="goods_cat">
              <!-- 选择商品分类的级联选择框 -->
              <el-cascader expandTrigger="hover" v-model="addForm.goods_cat" :options="cateList" :props="cateProps" @change="handleChange" clearable></el-cascader>
            </el-form-item>
            <el-button style="margin-top: 12px" @click="next">下一步</el-button>
          </el-tab-pane>
          <!-- 商品参数页签 -->
          <el-tab-pane label="商品参数" name="1">
            <!-- 在参数信息，商品属性面板中添加循环生成结构的代码 -->
            <!-- 渲染表单item项 -->
            <el-form-item :label="item.attr_name" :key="item.attr_id" v-for="item in manyTableData">
              <!-- 使用数组渲染复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox border :label="val" v-for="val in item.attr_vals" :key="val"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
            <el-button style="margin-top: 12px" @click="back">上一步</el-button>
            <el-button style="margin-top: 12px" @click="next">下一步</el-button>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <!-- 循环生成静态属性 -->
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
            <el-button style="margin-top: 12px" @click="back">上一步</el-button>
            <el-button style="margin-top: 12px" @click="next">下一步</el-button>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action 图片要上传到后阳台的地址 -->
            <el-upload :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture" :headers="headerOBJ" :on-success="fileSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
            </el-upload>
            <el-button style="margin-top: 12px" @click="back">上一步</el-button>
            <el-button style="margin-top: 12px" @click="next">下一步</el-button>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <el-form-item prop="goods_introduce">
              <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            </el-form-item>
            <el-button style="margin-top: 12px" @click="back">上一步</el-button>
            <el-button style="margin-top: 12px" @click="next">下一步</el-button>
          </el-tab-pane>
          <el-tab-pane label="完成" name="5">
            商品名称: {{ addForm.goods_name }} <br />
            商品价格: {{ addForm.goods_price }} 元<br />
            商品重量: {{ addForm.goods_weight }} kg <br />
            商品数量: {{ addForm.goods_number }} 件 <br />
            商品描述: <span v-html="addForm.goods_introduce"></span> <br />
            图片数量: {{ addForm.pics.length }} <br />
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button><br />
            <el-button style="margin-top: 12px" @click="back">上一步</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <el-dialog title="图片预览" :visible.sync="imgIsShow" width="30%">
      <img :src="preview" class="previewImg" />
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  name: 'add',
  data() {
    return {
      // 选项卡下标
      stepIndex: '0',
      //   表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        goods_introduce: '',
        attrs: []
      },
      //   新增表单校验规则
      addFormRules: {
        goods_name: [{ required: true, message: '请输入商品名称', trigger: 'blur' }],
        goods_price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }],
        goods_weight: [{ required: true, message: '请输入商品重量', trigger: 'blur' }],
        goods_number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }],
        goods_cat: [{ required: true, message: '请选择商品分类', trigger: 'blur' }],
        goods_introduce: [{ required: true, message: '请填写商品详情', trigger: 'blur' }]
      },
      //   级联选择框数据
      cateList: [],
      //   级联选择框配置
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 动态参数列表
      manyTableData: [],
      // 静态属性列表
      onlyTableData: [],
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      headerOBJ: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 图片预览文件地址
      preview: '',
      // 图片预览弹出框
      imgIsShow: false
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    // 上一步
    back() {
      this.stepIndex = String(Number(this.stepIndex) - 1)
    },
    // 下一步
    next() {
      const status = this.beforeTabLeave(String(Number(this.stepIndex) + 1), String(Number(this.stepIndex)))
      if (status) {
        this.stepIndex = String(Number(this.stepIndex) + 1)
        this.tabClicked()
      }
    },
    //   级联选择框事件
    handleChange() {
      // 判断是否为3级分类
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
        return this.$messagebox.alert('请选择第【3】级分类!!!!', '敲NM')
      }
    },
    //   获取整体分类数据
    async getCateList() {
      const { data: res } = await this.$axios({
        url: 'categories',
        method: 'GET'
      })
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.cateList = res.data
    },
    // 切换标签的之前的钩子函数
    beforeTabLeave(activeName, oldActiveName) {
      // 在tab栏切换之前触发，两个形参为切换前，后的tab栏name
      // 切换第一个标签触发
      if (oldActiveName === '0') {
        // 在第一个标签页的时候
        if (this.addForm.goods_cat.length !== 3) {
          this.$message.error('请选择商品的分类')
          return false
        } else if (this.addForm.goods_name.trim() === '') {
          this.$message.error('请输入商品名称')
          return false
        } else if (this.addForm.goods_price.trim() === '0') {
          this.$message.error('请输入商品价格')
          return false
        } else if (this.addForm.goods_weight.trim() === '0') {
          this.$message.error('请输入商品重量')
          return false
        } else if (this.addForm.goods_number.trim() === '0') {
          this.$message.error('请输入商品数量')
          return false
        }
      }
      return true
    },
    async tabClicked() {
      // 点击商品参数页签
      if (this.stepIndex === '1') {
        // 发送请求获取动态参数
        const { data: res } = await this.$axios.get(`categories/${this.cateId}/attributes`, { params: { sel: 'many' } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败')
        }
        // 将attr_vals字符串转换为数组
        res.data.forEach((item) => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      } else if (this.stepIndex === '2') {
        // 发送请求获取静态属性
        const { data: res } = await this.$axios.get(`categories/${this.cateId}/attributes`, { params: { sel: 'only' } })

        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性列表失败')
        }

        this.onlyTableData = res.data
      }
    },
    // 处理图片预览
    handlePreview(file) {
      this.preview = file.response.data.url
      this.imgIsShow = true
    },
    // 处理移除图片操作
    handleRemove(file) {
      const filePath = file.response.data.url
      const i = this.addForm.pics.findIndex((e) => e.pic === filePath)
      i > -1 && this.addForm.pics.splice(i, 1)
    },
    // 图片上传成功之后的返回值
    fileSuccess(res) {
      if (res.meta.status !== 200) this.$message.error('图片上传失败')
      this.addForm.pics.push({ pic: res.data.tmp_path })
      // this.addForm.pics.push({ pic: res.data.url })
    },
    // 确定新增商品
    add() {
      // 验证表单
      this.$refs.ruleForm.validate(async (valid) => {
        if (!valid) return this.$message.error('请填写必要的表单项!')
        // 处理动态参数
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach((item) => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
          this.addForm.attrs.push(newInfo)
        })
        // 执行添加业务
        // 先进行深拷贝
        const from = _.cloneDeep(this.addForm)
        from.goods_cat = from.goods_cat.join(',')
        const { data: res } = await this.$axios.post('/goods', from)
        if (res.meta.status !== 201) return this.$message.error(res.meta.msg)
        console.log(res)
        this.$message.success(res.meta.msg)
        // 编程式导航跳转到商品列表
        this.$router.push('/goods')
      })
    }
  },
  // 添加 计算属性获取三级分类
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style scoped>
.el-checkbox {
  margin: 0 10px 0 0;
}
.previewImg {
  width: 100%;
}
/* .ql-editor {
  min-height: 300px;
} */
.btnAdd {
  margin: 10px 0;
}
</style>
